Yes it is possible, just open pure maps, open the navigation menu (third icon at the bottom), then tap on the three dots on the top right hand corner and open the first line popping up which should be something like "using Stadia maps",
change it for GPX, and you are good to go,
now instead of a point A To point B in navigation you are offered to open a GPX file stored on your device

@lakotaubp I also had an issue with Teleports, on 20.04 RC (on Pixel 3a not Volla). I did the install with the installer without the wipe option.
To get a working Teleports I had to update with the openstore to the focal version which worked, but every time I turned off the device the old and not functional version was back, don't really understand why.
In the end I had to manually delete teleports (openstore couldn't delete it) and reinstall from fresh, now I have no problem.

I had a similar issue with youtube web which was stuck on a blank page even though I was on the working version for focal. I also had to manually delete the app to reinstall and get a working version.

Otherwise pretty impressed with 20.04, big thanks to everyone involved, what an achievement !

@martinm hi i just repaired my op3t after a daily driving another phone for a while and i noticed you didnt get an answer,
In my experience it is quite pleasant to use, most functionnalities are implemented (calls, Bluetooth...) and the device is reliable generally speaking, i can list a few things off the top of my head that are buggy/missing :
-camera works on both front and back camera but video recording does not work
-no control of volume in calls
-gps : does work but takes a long time to get a fix so it s hard to rely on it
-the port is based on halium 7.1 so you cant have waydroid running on it

Other than that i dont have much to complain about, i hope it answers you question, let me know if you have a specific question about it

Hi everyone and thanks for all the amazing work on this,
I tried the upgrade during the week end on OnePlus3T, i only noticed two things :

-The front camera view was upside down, but photographs were still properly oriented (no issue with rear camera)

-Dekko2 got stuck at boot, only displaying a white screen, i saw that this has already been reported, so i guess you dont need logs for this, tell me if you do, i will try to add it,

Again big thanks for all your work!

@peter-gamma hi, i didnt know about it and so i havent used it, but this thread is pretty old, since our discussion an app was published to the open store
lightP word processor, it does the trick for me, maybe you can check it out